Getting started with JSON and Java Web application

What is JSON?
JSON stands for JavaScript Object Notation. Its text-based open standard designed for human-readable data interchange. To know more about JSON read the wikipedia . Here is how JSON object holds the data.

Why use JSON in java web-application?
Its time to develop web-application that perform operation faster. Say if you want to process data without refreshing current page/content JSON is perfect solution for you. I'm going to show you quick demo with validating the email.